1211022002120 has 64 divisors (see below), whose sum is σ = 3297236388480. Its totient is φ = 390783568896.

The previous prime is 1211022002089. The next prime is 1211022002161. The reversal of 1211022002120 is 212002201121.

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

It is a junction number, because it is equal to n+sod(n) for n = 1211022002095 and 1211022002104.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127203434 + ... + 127212953.

It is an arithmetic number, because the mean of its divisors is an integer number (51519318570).

Almost surely, 2^{1211022002120} is an apocalyptic number.

1211022002120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211022002120 is an abundant number, since it is smaller than the sum of its proper divisors (2086214386360).

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

1211022002120 is a wasteful number, since it uses less digits than its factorization.

1211022002120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254416422 (or 254416418 counting only the distinct ones).

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

Adding to 1211022002120 its reverse (212002201121), we get a palindrome (1423024203241).

The spelling of 1211022002120 in words is "one trillion, two hundred eleven billion, twenty-two million, two thousand, one hundred twenty".