1220131210100 has 36 divisors (see below), whose sum is σ = 2888383339968. Its totient is φ = 443684076000.

The previous prime is 1220131210097. The next prime is 1220131210153. The reversal of 1220131210100 is 10121310221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 554603996 + ... + 554606195.

Almost surely, 2^{1220131210100} is an apocalyptic number.

1220131210100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220131210100 is an abundant number, since it is smaller than the sum of its proper divisors (1668252129868).

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

1220131210100 is a wasteful number, since it uses less digits than its factorization.

1220131210100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109210216 (or 1109210209 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 1220131210100 its reverse (10121310221), we get a palindrome (1230252520321).

The spelling of 1220131210100 in words is "one trillion, two hundred twenty billion, one hundred thirty-one million, two hundred ten thousand, one hundred".