20021101011210 has 64 divisors (see below), whose sum is σ = 53531219710080. Its totient is φ = 4758330635520.

The previous prime is 20021101011199. The next prime is 20021101011221. The reversal of 20021101011210 is 1211010112002.

It is an interprime number because it is at equal distance from previous prime (20021101011199) and next prime (20021101011221).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 885094836 + ... + 885117455.

It is an arithmetic number, because the mean of its divisors is an integer number (836425307970).

Almost surely, 2^{20021101011210} is an apocalyptic number.

20021101011210 is an abundant number, since it is smaller than the sum of its proper divisors (33510118698870).

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

20021101011210 is a wasteful number, since it uses less digits than its factorization.

20021101011210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1770212343.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20021101011210 its reverse (1211010112002), we get a palindrome (21232111123212).

The spelling of 20021101011210 in words is "twenty trillion, twenty-one billion, one hundred one million, eleven thousand, two hundred ten".