1111012121020 has 48 divisors (see below), whose sum is σ = 2336020098048. Its totient is φ = 443853748800.

The previous prime is 1111012121003. The next prime is 1111012121027. The reversal of 1111012121020 is 201212101111.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111012121027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111464077 + ... + 111474043.

It is an arithmetic number, because the mean of its divisors is an integer number (48667085376).

Almost surely, 2^{1111012121020} is an apocalyptic number.

1111012121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111012121020 is an abundant number, since it is smaller than the sum of its proper divisors (1225007977028).

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

1111012121020 is a wasteful number, since it uses less digits than its factorization.

1111012121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16330 (or 16328 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1111012121020 its reverse (201212101111), we get a palindrome (1312224222131).

The spelling of 1111012121020 in words is "one trillion, one hundred eleven billion, twelve million, one hundred twenty-one thousand, twenty".