10121211020 has 12 divisors (see below), whose sum is σ = 21254543184. Its totient is φ = 4048484400.

The previous prime is 10121211013. The next prime is 10121211029. The reversal of 10121211020 is 2011212101.

It is a super-2 number, since 2×10121211020² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10121210992 and 10121211010.

It is not an unprimeable number, because it can be changed into a prime (10121211029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 253030256 + ... + 253030295.

It is an arithmetic number, because the mean of its divisors is an integer number (1771211932).

Almost surely, 2^10121211020 is an apocalyptic number.

10121211020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10121211020 is an abundant number, since it is smaller than the sum of its proper divisors (11133332164).

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

10121211020 is a wasteful number, since it uses less digits than its factorization.

10121211020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506060560 (or 506060558 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 10121211020 its reverse (2011212101), we get a palindrome (12132423121).

The spelling of 10121211020 in words is "ten billion, one hundred twenty-one million, two hundred eleven thousand, twenty".