69121020 has 96 divisors (see below), whose sum is σ = 200245248. Its totient is φ = 17805312.

The previous prime is 69121009. The next prime is 69121051. The reversal of 69121020 is 2012196.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 358044 + ... + 358236.

It is an arithmetic number, because the mean of its divisors is an integer number (2085888).

Almost surely, 2^69121020 is an apocalyptic number.

69121020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 69121020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100122624).

69121020 is an abundant number, since it is smaller than the sum of its proper divisors (131124228).

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

69121020 is a wasteful number, since it uses less digits than its factorization.

69121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379 (or 377 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 69121020 is about 8313.9052195704. The cubic root of 69121020 is about 410.3962459141.

The spelling of 69121020 in words is "sixty-nine million, one hundred twenty-one thousand, twenty".