1235481081621 has 16 divisors (see below), whose sum is σ = 1649870544960. Its totient is φ = 822373059200.

The previous prime is 1235481081557. The next prime is 1235481081673. The reversal of 1235481081621 is 1261801845321.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1235481081621 - 2⁶ = 1235481081557 is a prime.

It is a super-3 number, since 3×1235481081621³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1235481082621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30921985 + ... + 30961913.

It is an arithmetic number, because the mean of its divisors is an integer number (103116909060).

Almost surely, 2^{1235481081621} is an apocalyptic number.

It is an amenable number.

1235481081621 is a deficient number, since it is larger than the sum of its proper divisors (414389463339).

1235481081621 is a wasteful number, since it uses less digits than its factorization.

1235481081621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55716.

The product of its (nonzero) digits is 92160, while the sum is 42.

The spelling of 1235481081621 in words is "one trillion, two hundred thirty-five billion, four hundred eighty-one million, eighty-one thousand, six hundred twenty-one".