121545021141 has 12 divisors (see below), whose sum is σ = 175574048832. Its totient is φ = 81025851816.

The previous prime is 121545021121. The next prime is 121545021167. The reversal of 121545021141 is 141120545121.

121545021141 is a `hidden beast` number, since 1 + 2 + 1 + 545 + 0 + 2 + 114 + 1 = 666.

It is not a de Polignac number, because 121545021141 - 2¹⁷ = 121544890069 is a prime.

It is a super-2 number, since 2×121545021141² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121545021121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 156411 + ... + 517256.

It is an arithmetic number, because the mean of its divisors is an integer number (14631170736).

Almost surely, 2^121545021141 is an apocalyptic number.

It is an amenable number.

121545021141 is a deficient number, since it is larger than the sum of its proper divisors (54029027691).

121545021141 is a wasteful number, since it uses less digits than its factorization.

121545021141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693720 (or 693717 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 27.

Adding to 121545021141 its reverse (141120545121), we get a palindrome (262665566262).

The spelling of 121545021141 in words is "one hundred twenty-one billion, five hundred forty-five million, twenty-one thousand, one hundred forty-one".