121641630 has 64 divisors (see below), whose sum is σ = 337229568. Its totient is φ = 27752960.

The previous prime is 121641601. The next prime is 121641671. The reversal of 121641630 is 36146121.

It is a super-2 number, since 2×121641630² = 29593372298113800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121641630.

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, 5232 + ... + 16451.

It is an arithmetic number, because the mean of its divisors is an integer number (5269212).

Almost surely, 2^121641630 is an apocalyptic number.

121641630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121641630 is an abundant number, since it is smaller than the sum of its proper divisors (215587938).

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

121641630 is a wasteful number, since it uses less digits than its factorization.

121641630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21721.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 121641630 is about 11029.1264386623. The cubic root of 121641630 is about 495.4814619692.

Adding to 121641630 its reverse (36146121), we get a palindrome (157787751).

The spelling of 121641630 in words is "one hundred twenty-one million, six hundred forty-one thousand, six hundred thirty".