1020012011100 has 108 divisors (see below), whose sum is σ = 3204077627296. Its totient is φ = 271415612160.

The previous prime is 1020012011099. The next prime is 1020012011149. The reversal of 1020012011100 is 11102100201.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 807217 + ... + 1640616.

Almost surely, 2^{1020012011100} is an apocalyptic number.

1020012011100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020012011100 is an abundant number, since it is smaller than the sum of its proper divisors (2184065616196).

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

1020012011100 is a wasteful number, since it uses less digits than its factorization.

1020012011100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2448316 (or 2448306 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1020012011100 its reverse (11102100201), we get a palindrome (1031114111301).

The spelling of 1020012011100 in words is "one trillion, twenty billion, twelve million, eleven thousand, one hundred".