1021101111212 has 72 divisors (see below), whose sum is σ = 2356387291440. Its totient is φ = 382691433600.

The previous prime is 1021101111203. The next prime is 1021101111223. The reversal of 1021101111212 is 2121111011201.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10497539 + ... + 10594362.

It is an arithmetic number, because the mean of its divisors is an integer number (32727601270).

Almost surely, 2^{1021101111212} is an apocalyptic number.

It is an amenable number.

1021101111212 is an abundant number, since it is smaller than the sum of its proper divisors (1335286180228).

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

1021101111212 is a wasteful number, since it uses less digits than its factorization.

1021101111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21091951 (or 21091942 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1021101111212 its reverse (2121111011201), we get a palindrome (3142212122413).

The spelling of 1021101111212 in words is "one trillion, twenty-one billion, one hundred one million, one hundred eleven thousand, two hundred twelve".