1221212022122 has 16 divisors (see below), whose sum is σ = 1842178090752. Its totient is φ = 607157937120.

The previous prime is 1221212022119. The next prime is 1221212022127. The reversal of 1221212022122 is 2212202121221.

It is a junction number, because it is equal to n+sod(n) for n = 1221212022094 and 1221212022103.

It is not an unprimeable number, because it can be changed into a prime (1221212022127) 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, 856058 + ... + 1781925.

It is an arithmetic number, because the mean of its divisors is an integer number (115136130672).

Almost surely, 2^{1221212022122} is an apocalyptic number.

1221212022122 is a deficient number, since it is larger than the sum of its proper divisors (620966068630).

1221212022122 is a wasteful number, since it uses less digits than its factorization.

1221212022122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2639293.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 1221212022122 its reverse (2212202121221), we get a palindrome (3433414143343).

Subtracting 1221212022122 from its reverse (2212202121221), we obtain a palindrome (990990099099).

The spelling of 1221212022122 in words is "one trillion, two hundred twenty-one billion, two hundred twelve million, twenty-two thousand, one hundred twenty-two".