20101011210 has 192 divisors, whose sum is σ = 60305865984. Its totient is φ = 4550400000.

The previous prime is 20101011173. The next prime is 20101011257. The reversal of 20101011210 is 1211010102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20101011192 and 20101011201.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 50127010 + ... + 50127410.

It is an arithmetic number, because the mean of its divisors is an integer number (314093052).

Almost surely, 2^20101011210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20101011210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30152932992).

20101011210 is an abundant number, since it is smaller than the sum of its proper divisors (40204854774).

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

20101011210 is a wasteful number, since it uses less digits than its factorization.

20101011210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989 (or 986 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 20101011210 its reverse (1211010102), we get a palindrome (21312021312).

The spelling of 20101011210 in words is "twenty billion, one hundred one million, eleven thousand, two hundred ten".