1221062838 has 8 divisors (see below), whose sum is σ = 2442125688. Its totient is φ = 407020944.

The previous prime is 1221062833. The next prime is 1221062839. The reversal of 1221062838 is 8382601221.

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

1221062838 is an admirable number.

It is a super-2 number, since 2×1221062838² = 2981988908689228488, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221062799 and 1221062808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221062833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101755231 + ... + 101755242.

It is an arithmetic number, because the mean of its divisors is an integer number (305265711).

Almost surely, 2^1221062838 is an apocalyptic number.

1221062838 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221062838 is a wasteful number, since it uses less digits than its factorization.

1221062838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203510478.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 1221062838 is about 34943.7095626666. The cubic root of 1221062838 is about 1068.8399335284.

The spelling of 1221062838 in words is "one billion, two hundred twenty-one million, sixty-two thousand, eight hundred thirty-eight".