212021225220454 has 16 divisors (see below), whose sum is σ = 342759081233520. Its totient is φ = 97780734136800.

The previous prime is 212021225220403. The next prime is 212021225220457. The reversal of 212021225220454 is 454022522120212.

It is a super-2 number, since 2×212021225220454² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021225220457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3133964064 + ... + 3134031715.

It is an arithmetic number, because the mean of its divisors is an integer number (21422442577095).

Almost surely, 2^{212021225220454} is an apocalyptic number.

212021225220454 is a deficient number, since it is larger than the sum of its proper divisors (130737856013066).

212021225220454 is a wasteful number, since it uses less digits than its factorization.

212021225220454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6267997095.

The product of its (nonzero) digits is 51200, while the sum is 34.

Adding to 212021225220454 its reverse (454022522120212), we get a palindrome (666043747340666).

The spelling of 212021225220454 in words is "two hundred twelve trillion, twenty-one billion, two hundred twenty-five million, two hundred twenty thousand, four hundred fifty-four".