20121033455 has 8 divisors (see below), whose sum is σ = 24797814432. Its totient is φ = 15661777248.

The previous prime is 20121033437. The next prime is 20121033461. The reversal of 20121033455 is 55433012102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20121033455 - 2¹² = 20121029359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54380987 + ... + 54381356.

It is an arithmetic number, because the mean of its divisors is an integer number (3099726804).

Almost surely, 2^20121033455 is an apocalyptic number.

20121033455 is a deficient number, since it is larger than the sum of its proper divisors (4676780977).

20121033455 is a wasteful number, since it uses less digits than its factorization.

20121033455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108762385.

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 20121033455 its reverse (55433012102), we get a palindrome (75554045557).

The spelling of 20121033455 in words is "twenty billion, one hundred twenty-one million, thirty-three thousand, four hundred fifty-five".