121012011001020 has 48 divisors (see below), whose sum is σ = 356666979795840. Its totient is φ = 30571455410496.

The previous prime is 121012011001009. The next prime is 121012011001067. The reversal of 121012011001020 is 20100110210121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 121012011000987 and 121012011001005.

It is a congruent number.

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, 53075442282 + ... + 53075444561.

It is an arithmetic number, because the mean of its divisors is an integer number (7430562079080).

Almost surely, 2^{121012011001020} is an apocalyptic number.

121012011001020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121012011001020 is an abundant number, since it is smaller than the sum of its proper divisors (235654968794820).

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

121012011001020 is a wasteful number, since it uses less digits than its factorization.

121012011001020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106150886874 (or 106150886872 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 121012011001020 its reverse (20100110210121), we get a palindrome (141112121211141).

The spelling of 121012011001020 in words is "one hundred twenty-one trillion, twelve billion, eleven million, one thousand, twenty".