1221222101102 has 4 divisors (see below), whose sum is σ = 1831833151656. Its totient is φ = 610611050550.

The previous prime is 1221222101101. The next prime is 1221222101107. The reversal of 1221222101102 is 2011012221221.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×1221222101102² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221222101101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305305525274 + ... + 305305525277.

It is an arithmetic number, because the mean of its divisors is an integer number (457958287914).

Almost surely, 2^{1221222101102} is an apocalyptic number.

1221222101102 is a deficient number, since it is larger than the sum of its proper divisors (610611050554).

1221222101102 is an equidigital number, since it uses as much as digits as its factorization.

1221222101102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610611050553.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1221222101102 its reverse (2011012221221), we get a palindrome (3232234322323).

The spelling of 1221222101102 in words is "one trillion, two hundred twenty-one billion, two hundred twenty-two million, one hundred one thousand, one hundred two".