121270690 has 16 divisors (see below), whose sum is σ = 231127992. Its totient is φ = 45654784.

The previous prime is 121270637. The next prime is 121270691. The reversal of 121270690 is 96072121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 85951441 + 35319249 = 9271^2 + 5943^2 .

It is a super-2 number, since 2×121270690² = 29413160506152200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121270691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 356509 + ... + 356848.

Almost surely, 2^121270690 is an apocalyptic number.

121270690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121270690 is a deficient number, since it is larger than the sum of its proper divisors (109857302).

121270690 is a wasteful number, since it uses less digits than its factorization.

121270690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713381.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 121270690 is about 11012.2972172022. The cubic root of 121270690 is about 494.9773005950.

The spelling of 121270690 in words is "one hundred twenty-one million, two hundred seventy thousand, six hundred ninety".