1012121220100 has 72 divisors (see below), whose sum is σ = 2312374498560. Its totient is φ = 383461614720.

The previous prime is 1012121220091. The next prime is 1012121220161. The reversal of 1012121220100 is 10221212101.

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, 9612942 + ... + 9717658.

It is an arithmetic number, because the mean of its divisors is an integer number (32116312480).

Almost surely, 2^{1012121220100} is an apocalyptic number.

1012121220100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1012121220100 is an abundant number, since it is smaller than the sum of its proper divisors (1300253278460).

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

1012121220100 is a wasteful number, since it uses less digits than its factorization.

1012121220100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109837 (or 109830 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1012121220100 its reverse (10221212101), we get a palindrome (1022342432201).

The spelling of 1012121220100 in words is "one trillion, twelve billion, one hundred twenty-one million, two hundred twenty thousand, one hundred".