20122121216056 has 8 divisors (see below), whose sum is σ = 37728977280120. Its totient is φ = 10061060608024.

The previous prime is 20122121215927. The next prime is 20122121216129. The reversal of 20122121216056 is 65061212122102.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×20122121216056³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1257632575996 + ... + 1257632576011.

It is an arithmetic number, because the mean of its divisors is an integer number (4716122160015).

Almost surely, 2^{20122121216056} is an apocalyptic number.

It is an amenable number.

20122121216056 is a deficient number, since it is larger than the sum of its proper divisors (17606856064064).

20122121216056 is a wasteful number, since it uses less digits than its factorization.

20122121216056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2515265152013 (or 2515265152009 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

Adding to 20122121216056 its reverse (65061212122102), we get a palindrome (85183333338158).

The spelling of 20122121216056 in words is "twenty trillion, one hundred twenty-two billion, one hundred twenty-one million, two hundred sixteen thousand, fifty-six".