121620827 has 2 divisors, whose sum is σ = 121620828. Its totient is φ = 121620826.

The previous prime is 121620797. The next prime is 121620841. The reversal of 121620827 is 728026121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121620827 - 2⁸ = 121620571 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121620827.

It is not a weakly prime, because it can be changed into another prime (121620857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60810413 + 60810414.

It is an arithmetic number, because the mean of its divisors is an integer number (60810414).

Almost surely, 2^121620827 is an apocalyptic number.

121620827 is a deficient number, since it is larger than the sum of its proper divisors (1).

121620827 is an equidigital number, since it uses as much as digits as its factorization.

121620827 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 121620827 is about 11028.1833046064. The cubic root of 121620827 is about 495.4532148182.

Adding to 121620827 its reverse (728026121), we get a palindrome (849646948).

The spelling of 121620827 in words is "one hundred twenty-one million, six hundred twenty thousand, eight hundred twenty-seven".