121001020 has 48 divisors (see below), whose sum is σ = 291207168. Its totient is φ = 41371200.

The previous prime is 121000993. The next prime is 121001033. The reversal of 121001020 is 20100121.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is a junction number, because it is equal to n+sod(n) for n = 121000994 and 121001012.

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, 61045 + ... + 62995.

It is an arithmetic number, because the mean of its divisors is an integer number (6066816).

Almost surely, 2^121001020 is an apocalyptic number.

121001020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121001020 is an abundant number, since it is smaller than the sum of its proper divisors (170206148).

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

121001020 is a wasteful number, since it uses less digits than its factorization.

121001020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2410 (or 2408 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 121001020 is about 11000.0463635387. The cubic root of 121001020 is about 494.6101341307.

Adding to 121001020 its reverse (20100121), we get a palindrome (141101141).

The spelling of 121001020 in words is "one hundred twenty-one million, one thousand, twenty".