21002210211020 has 192 divisors, whose sum is σ = 48356448650496. Its totient is φ = 7632357949440.

The previous prime is 21002210211019. The next prime is 21002210211043. The reversal of 21002210211020 is 2011201220012.

It is a super-3 number, since 3×21002210211020³ (a number of 41 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21002210210986 and 21002210211004.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 241380644 + ... + 241467636.

It is an arithmetic number, because the mean of its divisors is an integer number (251856503388).

Almost surely, 2^{21002210211020} is an apocalyptic number.

21002210211020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21002210211020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24178224325248).

21002210211020 is an abundant number, since it is smaller than the sum of its proper divisors (27354238439476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21002210211020 is a wasteful number, since it uses less digits than its factorization.

21002210211020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87300 (or 87298 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21002210211020 its reverse (2011201220012), we get a palindrome (23013411431032).

The spelling of 21002210211020 in words is "twenty-one trillion, two billion, two hundred ten million, two hundred eleven thousand, twenty".