121897628 has 12 divisors (see below), whose sum is σ = 216325872. Its totient is φ = 60090240.

The previous prime is 121897621. The next prime is 121897637. The reversal of 121897628 is 826798121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121897621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214325 + ... + 214892.

It is an arithmetic number, because the mean of its divisors is an integer number (18027156).

Almost surely, 2^121897628 is an apocalyptic number.

It is an amenable number.

121897628 is a deficient number, since it is larger than the sum of its proper divisors (94428244).

121897628 is a wasteful number, since it uses less digits than its factorization.

121897628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429292 (or 429290 counting only the distinct ones).

The product of its digits is 96768, while the sum is 44.

The square root of 121897628 is about 11040.7258819337. The cubic root of 121897628 is about 495.8288029967.

The spelling of 121897628 in words is "one hundred twenty-one million, eight hundred ninety-seven thousand, six hundred twenty-eight".